<?php
/**
 * @brief		File Storage Extension: {class}
{subpackage}
 * @since		{date}
 */

namespace IPS\{app}\extensions\core\FileStorage;

/* To prevent PHP errors (extending class does not exist) revealing path */
if ( !\defined( '\IPS\SUITE_UNIQUE_KEY' ) )
{
	header( ( isset( $_SERVER['SERVER_PROTOCOL'] ) ? $_SERVER['SERVER_PROTOCOL'] : 'HTTP/1.0' ) . ' 403 Forbidden' );
	exit;
}

/**
 * File Storage Extension: {class}
 */
class _{class}
{
	/**
	 * Count stored files
	 *
	 * @return	int
	 */
	public function count(): int
	{
		return \IPS\Db::i()->select( 'COUNT(*)', '...', '...' )->first();
	}
	
	/**
	 * Move stored files
	 *
	 * @param	int			$offset					This will be sent starting with 0, increasing to get all files stored by this extension
	 * @param	int			$storageConfiguration	New storage configuration ID
	 * @param	int|NULL	$oldConfiguration		Old storage configuration ID
	 * @throws	\UnderflowException					When file record doesn't exist. Indicating there are no more files to move
	 * @return	void|int							An offset integer to use on the next cycle, or nothing
	 */
	public function move( $offset, $storageConfiguration, $oldConfiguration=NULL )
	{
		\IPS\File::get( $oldConfiguration ?: '{app}_{class}', '...' )->move( $storageConfiguration );
	}

	/**
	 * Check if a file is valid
	 *
	 * @param	string	$file		The file path to check
	 * @return	bool
	 */
	public function isValidFile( $file ): bool
	{
	}

	/**
	 * Delete all stored files
	 *
	 * @return	void
	 */
	public function delete()
	{
	}
}